{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell line", "RNA", "cell type", "DNA", "protein"], "input": "The present work has examined the effects of okadaic acid , an inhibitor of type 1 and 2A protein phosphatases , on the regulation of c-jun expression during monocytic differentiation of U-937 leukemia cells ."}
{"cell line": ["U-937 leukemia cells"], "RNA": [], "cell type": [], "DNA": ["c-jun"], "protein": []}